I have been wondering about using this on my Cornus stump. That would be
to accelerate its decomposition, of course, not to kill it as that would
be an unapproved use.
But I just had a look at the Westland Garotta pack in my local garden
centre, and there is absolutely no mention of what it contains. I
thought it might say "Ammonium Sulfamate" somewhere, but there's not
mention of it. However, on the information sheet at
states that the hazardous ingredients are "Silicone (sic) Dioxide 35 -
40%" and "Limestone 35 - 40%".So it's sand and limestone. No ammonium
sulfamate to be seen.